Reaming and threading machine



Dec; 21 1926.

C. R. EDWARDS REAMlNG AND THREADING MACHINE 2 St1eetS-Sheet 1 Filed Dec.21 1926." 1,611,516

C. R. EDWARDS REAMING AND THREADING MACHINE Filed Jan. 17, 1921 2Sheets-Sheet 2 Q H OM 1443/5 Patented Dec. 21, 1926. I

UNITED STATES PATENT OFFICE.

CHARLES R. EDWARDS, OF HOUSTON, TEXAS, ASSIGNOR TO WOODS, JOHN 6'6 COX,OF

' HOUSTON, TEXAS.

REAMING AND 'rnnnamnc MACHINE,

.This invention relates to new and useful improvements in a reaming andthreading machine.

One object of the invention is to provide a machine of the characterdescribed which may be used for reaming out and threading pipe couplingswhich have a double taper, that is, which are flared outwardly each wayfrom the center to receive the ends of pipe joints tobe connectedthereby.

The invention herein described and claimed embodies a collapsible tapercutting .tool embodying radially movable cutters, and means forreleasing the cutters from the work, upon completion of the cuttingoperation so that the tool may be withdrawn from within and without thework, 'with .the cutters out of contact with the work.

Another object of the invention is to provide a device of this characterwhereby the coupling may be either reamed or threaded at a singleoperation thus accomplishing, by easy operation, work which at thepresent time is diflicult to perform.

\Vith the above and other objects in view the invention has particularrelation to certain novel features of construction, opera tion andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawings, wherein:

Figure 1 is a side view of the form of device used for tapping out thecoupling, shown partially in section.

Figure 2 is a fragmentary bottom view thereof, and

Figure 3 is a side view, shown partially in section, of the form ofdevice when used for reaming the coupling preparatory to threading thesame.

Referring now more particularly to the drawings, the numeral 1designates the lathe turret and the numeral 2 designates the lathechuck. These parts are of the conventional form now forming part of theordinary lathe. The numeral 3 designates the body of the device which ismounted in the turret 1 and is held against rotation thereby by means ofa set bolt 4 whose inner end' projects into a key-way 5, in said body.The numeral 6 refers to a sleevewhioh is slidably mounted on said bodyand whose underside has the deep notch 7 at its turret end, said notchbeing in alignment with a slot 8 cut.

through the body 3. The body 3 has a deep 1 and bar.

bearing 9 .extendin from the free end thereof back almost to t e turretin which is seated the profile bar 10 which projects out beyond saidbody. A set .bolt 11 passes through the notch 7 and the slot 8 and isthreaded into said profile bar and operates to hold said sleeve and bodyagainst turning relative to said bar, but permits the body to movelengthwise relative tosaid sleeve The numeral 12 designates the couplingto be tapped. This coupling. has

been previously reamed out to give it the required inside contour, asshown, and it is held in the chuck 2 in theusual way and rotatedthereby. Theouter end of the profile bar is enclosed within a pilot 13,oneno l end of which is threaded into the free end of-the body 3 and theother end of which slides through a suitable bearing into which thechuck is formed. The free end of the body hasoblong radial slots'therethrough fp igning bearings in which the chasers l4 s 1 e. gularlydisposed groove 15 therein forming a bearing and adjacent each chaserthe body 3 has a lengthwlse bearing 16 in which a plunger 17 operates.-Each plunger has a laterally extending stud 18 which projects into thegroove 15 and seated within the bearing 16 there'is a coil spring 19which operates against said plunger, thus holding the stud 18 againstthe inclined face of the groove 15 whichin turn operates to hold thechasers closely against the profile bar. Rotatably mounted upon thesleeve are the oppositely disposed disc-like rollers 20.

oln operation the body 3 is moved by the' lathe toward the work untilthe rollers 20 contact a ainst the opposin end of the coupling an thesleeve 6 is t ereby held stationary while the body 3 and pilot 13 moveon through the chuck until the end of the work is reached. The body isheld by the lathe against rotation while. the coupling is rotatedv bythe chuck, as above explained. The chasers 14 o crate to' form interiorthreads in the coup ing. While the first half of the coupling is beingthreaded the rear- One side of each chaser has an anwardly inclined face21 of each chaser rides down the tapering face 22- of the profile baruntil the center of the coupling is reached and thereafter the forwardlyinclined face 23 of said chaser rides up the taperin face 24 of theprofile bar, finishing the wor and thus giving a double taper to thecoupling.

When the work is finished the chasers I bar 10 is of the same generalcontour as that eluding a body,

' mounted therein, a profile bar having double taper mounted slidably insaid body,

- ried by the sleeve for abutting the work.

' ing carried b .work, radial In this connection itis to be Observe tiveend is enclosed by the pilot 13 an the profile of the desired insidecontour of .to said body and working, over the projectride mounted insaid. bod and held yieldingly down the conical-shaped free end of theagainst said bar, sai members bein actuprofile bar under the actuatlonof the ated by said bar as the same is moved length.- springs 19 7together so that the device may be readily ing 'angularly aring faceswhich alterwithdrawn back through the coupling to natively ride on saidbar.

original position and in readiness to resume the workof tapping anothercou ling. eluding a body a profile bar having a bearthat ing in saidbody and formed with a double the operative end of theprofile bar has ataper, and one end of which projects there double taper corresponding incontour to the from, a sleeve-like pilot secured to said body insidetaper of the coupling to be tapped. and working-over the free end ofsaid bar, The general operation of the reaming de radially movablecutters carried by said vice is the same as that of the threading orbody and formed with angularly disposed tapping device. This reamingdevice is ilaces which ride on said bar and means holdlustrated inFigure 3 and the body thereof is ing said cutters yieldingly againstsaid bar. designated by the numeral 3. The profile 4. A device of thecharacter described ina profile bar having a bearerai ing in said bodyand one end of which proof the profile bar 10 and its outer or o has1ects therefrom, a sleeve-like pilot secured the coupling 12. In thereaming device the ing end of said bar, radiallymovable cutters reamingcutters 26 are substituted for the mounted in said body and havingangularly chasers 14: and work through in the body 3' and their innerends are held working against said cutters and normally against therofile bar by means of the holding them against said bar, a sleevefitted springs 19 w iich work against the plunger over said body andhaving a limited length- 17, these plungers having the laterallyex- Wisemovement relative thereto and rollers tending studs 18 which work in theinclined carried bythc sleeve. bearings 15 of the respective cutters.The 5. A device for forming the interior conoperative end of the rofilebar has the contour of a couplin and including a body tour of thedesired interior contour of the adapted to work t rough said coupling, acoupling and the cutters, following said-conpro 1e bar having a bearingin said body and tour of the profile bar, ream out the couone. end ofwhich projects therefrom, a pling and give it a corresponding contour.sleeve-like pilot secured to said body and As above explained the bodyof the device workin over the projecting end of said is moved toward thework by the lathe unbar, ra ially movablecutters mounted in said til therollers 20 contact against the opbody and whose inner ends are heldyieldposing end of the, coupling and the sleeve 6 ingly against saidbar, said cutters, following is thereby held stationary while the body 3the contour of the bar as the device works and the pilot-13 move-onthrough the chuck through the coupling to be operated on, a until theend of the work is reached and sleeve slidably mounted on said body andthe cutters then follow the tapering end 25 rollers which operateagainst the coupling to of the contour bar and are retracted or withholdthe profile bar stationary during the drawn inwardly to permit theentire device progress of the work. to be ulled backwardly into originalpo- 6. A device of the character described insition t rough thecoupling. l eluding a body, a profile bar having a vary- What I claim ising contour and a bearing in said body, and 1. A device of-the characterdescribed inone end of which pro ects therefrom, a eluding a bodradially movable cutters sleeve-like pilot secured to said body and aworking over the free end of said bar, ra-

dially movable cutters carried by said body resilient members operatingagainst said and formed with angularly disposed bearcutters and normallyholding them against ing faces which alternatively bear against saidbar, a sleeve fitted over the body and the bar, means holdin saidcutters a ainst having a limited longitudinal movement said bar,and'means a utting the wor k for relative thereto, and bearing memberscarholding the profile bar stationary with respect to the work.- a 2.- Adevice of the character described in- 7. A device of the characterdescribed including a body, a profile bar having a double eluding ab0r1'y,a profile bar having a beartaper slidably mounted therein andhaving ing in said body and one end of which proa limited lengthwisemovement relative jects therefrom, a sleeve-like pilot secured tothereto, aslidable sleeve on the body, a bearsaid body and workin overthe projecting the sleeve for abutting the end of said bar, radiallymovable cutters y movable cutting members mounted in said body,

and are thus contracted or drawn wise in said body), said cuttingmembers hava means working against I 3. A. device otthe characterdescribed in- I said cutters and normally holding them ada ted to workthrough said coupling, a

pro le bar havin a bearing in said body and one end-of "wich projectstherefrom, a sleeve-like pilot secured to said bod and Working over theprojecting end of said bar radially movable cutters mounted in sai bodand whose inner ends are held against sai bar, said cutters followingthe contour of the bar as the device works through the coupling to beelperated on, a sleeve slidably mounted on sai body and rollers which operate against the coupling to hold the profile bar stationary during theprogress of the work.

9. A- collapsibletaper cutting tool including a body, radially movablecutters mounted therein, a profile member axially movable relative tothe work and having a double taper forming a bearing surface for, andworking between, the cutters and controllin the diameter at which thecutters work, and an abutment adapted to limit the axial movement ofsaid profile bar relative to the work, said bearing surface terminatingwith a reduced diameter to permit the cutters to clear the work for theremoval of the tool through the work.

10. In a ta r cutting tool for shaping internally a tu ular member, abody, cutters mounted in the body, a profile member axiall movablerelative to the work, having 7 a dou le taper and forming a bearingagainst

